@inproceedings{babych-hartley-2004-extending,
    title = "Extending the {BLEU} {MT} Evaluation Method with Frequency Weightings",
    author = "Babych, Bogdan  and
      Hartley, Tony",
    booktitle = "Proceedings of the 42nd Annual Meeting of the Association for Computational Linguistics ({ACL}-04)",
    month = jul,
    year = "2004",
    address = "Barcelona, Spain",
    url = "https://preview.aclanthology.org/landing_page/P04-1079/",
    doi = "10.3115/1218955.1219034",
    pages = "621--628"
}